<%@ page contentType="text/html;charset=UTF-8" %> <HTML>
<BODY bgcolor=cyan>
<Font size=1> <P>输入一个数,servlet 求这个数的平方根:
<FORM action="hello" method=get> 
<Input Type=text name=number>
<Input Type=submit value="提交">
</FORM>
</BODY>
</HTML>